Control Method of Railway Signal AC Power Supply Stabilization
A technology of AC power supply and voltage stabilization control, which is applied in the direction of converting AC power input to AC power output, electrical components, and conversion equipment that can be converted to DC without intermediate conversion, so as to reduce the frequency of shifting voltage shocks and avoid program flying. The effect of running and strengthening protection
Active Publication Date: 2021-02-26
HUNAN UNIV OF TECH +1
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Problems solved by technology
[0004] In order to solve the problems existing in the existing compensating AC voltage stabilizing device, the present invention provides a railway signal AC power supply stabilizing control method, including:
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[0041] The present invention will be further described below in conjunction with accompanying drawing.
[0042] figure 1 In order to realize the composition block diagram of the AC voltage stabilizing device of the railway signal AC power supply voltage stabilization control method, the sampling comparison unit performs voltage sampling on the AC power supply voltage, and outputs the trigger gating control value P2; the delay protection unit inputs the trigger gating control value P2, and outputs The delayed trigger gating control value P3 and the non-triggering area control signal P4; the trigger gating configuration unit inputs the delayed trigger gating control value P3, and outputs the trigger control signal P5; the trigger unit sends out the trigger control signal P5 according to the input The trigger signal P6 is sent to the compensation main circuit to control the on-off of the bidirectional thyristor in the thyristor bridge; the error detection and judgment unit inputs...
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The invention discloses a railway signal AC power voltage stabilizing control method. The method is implemented through an AC voltage stabilizer which comprises a compensation main circuit, a samplingcomparison unit, a delay protection unit, a trigger gating configuration unit, a trigger unit, an error detection and discrimination unit, and a protection drive unit. The compensation main circuit includes a compensation transformer group, a thyristor bridge, and a relay protection switch. The trigger gating configuration unit outputs a trigger control signal according to the output of the sampling comparison unit and the delayed trigger gating control value, and the trigger unit controls the on / off of a bidirectional thyristor in the thyristor bridge. The AC voltage stabilizing control method can adjust the number of partitions of voltages in the input AC power voltage fluctuation range, changes the compensation mode and the compensation precision. While achieving the interlocking control, the method also starts / stops the open circuit protection of the thyristor bridge according to a condition of whether the trigger gating control value is valid or not, and controls the power supplyof the trigger unit, thereby effectively strengthening the protection against abnormal working conditions and making the work more stable and reliable.
Description
technical field [0001] The invention relates to the technical field of power supplies, in particular to a voltage stabilization control method for railway signal AC power supplies. Background technique [0002] The existing compensating AC voltage stabilizing device has the advantages of wide voltage stabilizing range, almost no distortion of waveform, high overall efficiency and strong load adaptability. The principle is to automatically control the switching of different winding coils of the primary winding on the compensation transformer according to the level of the input voltage, using the ratio relationship between the primary side working winding and the secondary winding, or by adjusting the voltage applied to the primary winding , providing bidirectional and multi-level voltage compensation, so as to achieve the purpose of voltage regulation and stabilization. [0003] The railway signal AC power supply used for signal lighting, turnout display, CTC equipment, etc....
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IPC IPC(8): H02M5/10H02M5/257
CPCH02M5/10H02M5/257
Inventor 凌云张海军谭华容刘飞宋建波肖伸平
Owner HUNAN UNIV OF TECH